Update documentation

Changelog.md

@@ -6,6 +6,8 @@
 
 - New feature "Scan Mailboxes". Docspell can now read mailboxes
   periodically to import your mails.
+- New feature "Integration Endpoint". Allows an admin to upload files
+  to any collective using a separate endpoint.
 - Fix the `find-by-checksum` route that, given a sha256 checksum,
   returns whether there is such a file in docspell. It falsely
   returned `false` although documents existed.
@@ -20,7 +22,7 @@
 
 ### Configuration Changes
 
-The joex component has new config sections:
+The joex and rest-server component have new config sections:
 
 - Add `docspell.joex.mail-debug` flag to enable debugging e-mail
   related code. This is only useful if you encounter problems
@@ -29,6 +31,8 @@ The joex component has new config sections:
   configure the new scan-mailbox user task.
 - Add `docspell.joex.files` section that is the same as the
   corresponding section in the rest server config.
+- Add `docspell.rest-server.integration-endpoint` with sub-sections to
+  configure an endpoint for uploading files for admin users.
 
 ### REST Api Changes
 
@@ -36,6 +40,9 @@ The joex component has new config sections:
 - Add `/sec/email/settings/imap`
 - Add `/sec/usertask/scanmailbox` routes to configure one or more
   scan-mailbox tasks
+- The data used in `/sec/collective/settings` was extended with a
+  boolean value to enable/disable the "integration endpoint" for a
+  collective.
 
 
 ## v0.5.0

modules/microsite/docs/doc/uploading.md

@@ -85,6 +85,31 @@ docspell count the files uploaded through the web interface, just
 create a source (can be inactive) with that name (`webapp`).
 
 
+## Integration Endpoint
+
+Another option for uploading files is the special *integration
+endpoint*. This endpoint allows an admin to upload files to any
+collective, that is known by name.
+
+```
+/api/v1/open/integration/item/[collective-name]
+```
+
+The endpoint is behind `/api/v1/open`, so this route is not protected
+by an authentication token (see [REST Api](../api) for more
+information). However, it can be protected via settings in the
+configuration file. The idea is that this endpoint is controlled by an
+administrator and not the user of the application. The admin can
+enable this endpoint and choose between some methods to protect it.
+Then the administrator can upload files to any collective. This might
+be useful to connect other trusted applications to docspell (that run
+on the same host or network).
+
+The endpoint is disabled by default, an admin must change the
+`docspell.restserver.integration-endpoint.enabled` flag to `true` in
+the [configuration file](configure#rest-server).
+
+
 ## The Request
 
 This gives more details about the request for uploads. It is a http